Automatic governor for pneumatic motors.



No. 806,609. V PATENTED DEC. 5, 1905.

J. WIBSER.

AUTOMATIC GOVERNOR FOR PNEUMATIC MOTORS.

APPLICATION FILED MAILZ. 1905.

5 SHEETS-SHEET 1.

A A -T N k No. 806,609. PATENTED DEG. 5,1905.

* J. WIESER. Y r I AUTOMATIC GOVERNOR FOR PNEUMATIC MOTORS.

APPLICATION FILED MABHZ. 1905.

5 $EEETS-SHEBT 2.

No.806,609.- PATBNTED 1120.5,1905.

, mwmsm.

V AUTOMATIC GOVERNOR FOR PNEUMATIC MOTORS.

' APPLICATION FILED Mum/1905.

- 5 sHnnTs-sHnBT-s.

N0- 806,609. PATENTED DEC. 5, 1905.

J. WIESER. y AUTOMATIC GOVERNOR FOR PNEUMATIU MOTORS.

APPLICATION FILED MAR.2. 1905.

' 5 SHEETS-SHEET 4.

' PATENTED DEC. 5, 1905.

} J. WIESER. AUTOMATIC GOVERNOR FOR PNEUMATIC MOTORS.

APPLICATION FILED MAR. 2. 1905.

5 SHEETS-SHEET 5.

zen of the United States, residing in New York,

lows or the speed or force of the pedal-action like, for operating the devices by whichthe unirnn STATES JOSEPH 'WIEsER, OF NEW YORK, N. Y.

' AUTOMATI CIROVERNOR FOR PNEUMATIC MOTORS.

Specification of I Application filed March 2,

To aZZ whom it may concern:

Be it known that I, J OSEPH WIESER, a citiborough of Brooklyn, in the State of New York, have invented certain new and useful Improvements in Automatic Governorsfor Pneumatic Motors, of which the following is a specification.

This invention relates toan improved automatic governor for pneumatic motors which are employed in mechanical musical instruments, such as self-playingpianos and the perforated music-sheet is actuated, the governor being designed with a view of insuring the uniform action of the motor regardless of the variations of pressure in the motor-belfor operating the pump-bellows, the object of the governor being to produce an approximately uniform pressure in the wind-chambers and pneumatics of the motor, and thereby'the even motion of the music-sheet.

With these ends in view the invention con sists in the novel features of construction and combinations of parts, which will be fully described hereinafter and finally pointed out in the claims. V

In the accompanying drawings, Figure 1 is afront elevation of my improved automatic governor for pneumatic motors shown in po sition for use me. self-playing piano. Fig. 2 is a side elevation of thesame, showing its connection withthe pedal-operated pump-bellows. Fig. 3 is a vertical transverse section on line 3 3, Fig. 1, showing the pump-bellows, motor-bellows, and the parts composing the automatic governor in a position ofrest. Fig. 4 is a similar vertical transverse section showing the parts in a collapsed position for regulating the suction action on the pneumatic motor. Fig. 5 is a side elevation of the motor-bellows, taken from the opposite side and showing the adjusting-lever mechanism for the valve actuated bythe movable member of the motor-bellows; and Fig. 6 is a sectional front elevation of the parts shown in Fig. 1, showing the interior parts'of the same, some of them being broken away.

Similar letters ,of reference indicate corresponding parts throughout the several views.

Referring to the drawings, B designates the Letters Patent.

1905. Serial No. 248,128.

Patented Dec. 5, 1905.

the pneumatic valve-actions V, of which there is one more than is necessary to operate the pneumatics by which the key-actuating lift? ers (not shown) of a piano or other musical instrument are operated under the influence of a perforated traveling music-sheet. The purpose of the extra valve-action will be described hereinafter. The motor-bellows B and suction-bellows B are operated by the of the motor, while the suction-bellows B is connected with the wind-chest of the valveactions V. The pneumatic motor which drives the music-sheet is not shown in the drawings;

but it is located at any suitable point of the self-playing piano. or other mechanical musical instrument in proximity to the music sheet driving mechanism.

The motor-bellows B is provided between its stationary and movable members with a V-shaped spring S, the tension of which ex- I pands the bellows in opposition to the suction action of the pump-bellows, which latter exerts a collapsing action on the motor-bellows; The motor-bellows B is further provided at its inside on its stationary member with a sliding cut-off valve D, which is guided in upright ways d and which is provided with an opening or openings 0. adapted to be shiftaction being preferably arrangedat the end of the tier of valve-actions, as shown in Fig. 1. To the side of the movable member of the motor-bellows B, adjacent the suctionbellows B, is applied a pivoted lever f, which carries atits lower end a valve f, serving to open or close a stationary duct which is connected by a flexible tube f with'cthe dia motor-bellows, and B the suction-bellows for phragm-cham-ber of the extra valve-action V,

ed into and out of-register with an opening 0' as shown cleariy in Figs. 3 and 4, said lever being capable of adjustment means of a set-screw f located in a lug f", attached to the movable member of the regulator-bellows,

\ the vibrations of the movable member of the motor-bellows as the same is alternately expanded under the tension of its spring or collapsed under the influence of the suction action of the pump-bellows. The pivoted valvecarrying lever fis acted upon by a spring f which is shown in Fig. 5, and which holds it against the set-screw f*, so as to cause the leverfto follow themotions of the movable member of the motor-bellows and press the valve f either tightly against the port of the duct f for closing the same or move it away from the port for opening the duct f The wind-chest of the valve-actionsV is connected by an air-channel with the suction-bellowsB, as indicated in Figs. 1 and 6, so that the space immediately above the diaphragm of the Valve of the extra valve-action is always under the influence of suction. As a consequence as soon as the valve f of the motor-bellows B opens the stationary duct f the atmospheric air, which enters the tube destroys the equilibrium of the valve-diaphragm, which is then raised by suction and carries with it the valve, so that suction is created in the valve-chamber and by means of the tube 9 in the governor-pneumatic G. This pneumatic in collapsing moves the cutofl valve D upwardly, whereby the openings in said valve register with the openings 0' and permit thereby the pump-bellows to exert a greater suction action on the motor-bellows and produce the collapsing of the same. The vibration of the movable member of the motor-bellows against the tension of its spring under the influence of the suction action of the pump-bellows when the openings 0 0 register with each other produces the closing of the valve f on the port of the stationary duct f, by which the inlet of air to the diaphragm-chamber of the valve-action V is interrupted and the pneumatic valve and its diaphragm returned by gravity into their former or normal position, so that the governor-pneumatic Gr is instantly expanded by its spring when the atmospheric pressure which passes through the top of the valve-chamber and through the connecting-tube g is admitted into the same. The cut-off valve D is thereby moved in downward direction by the spring of the governor-pneumatic Gr, so that the suction action of the pump-bellows on the mo--- tor-bellows is momentarily interrupted and the movable member of the same returned under the action of its spring S into outward or motion is imparted thereto.

expanded position, as shown in Fig. By the expansion of the motor-bellows B the valve f is movedaway from the port of the stationary duct) and the latter opened, so that the diaphragm and valve of the valve-action V are again actuated, the governor-pneumatic G collapsed, and the cut-off valve returned into raised position, restoring thereby the connection of the motor-bellows with the pump-bellows and producing the collapsing of the motor-bellows, the alternating expansion of the motor-bellows under the influence of its spring and collapse by the suction action of the pumpbellows by the actuation of the pneumaticvalveaction V and the governor-pneumatic G producing the alternating up and down movement or play of the cut-off valve D, so thata uniform suction pressure is established in the motor-bellows and by the same on the pneumatic motor, so that the regular motion of the music-sheet is obtained.

As all the air which enters and operates the pneumatic motor passes through the motorbellows and as the motor-bellows is alternately expanded by its spring and collapsed under the suction action of the pump-bellows, in connection with the action of the vibrating valve f on the stationary duct f, and the action of the pneumatic valve-action on the governor-pneumatic and the sliding cut-0d valve, the motor-bellows is fully and sensitively responsive to the variations of air-pressure on the same. Consequently when the exhaust force of the pump-bellows becomes excessive by rapid pumping the motor-bellows becomes partially collapsed and prod uccs by the closing of its valve on the stationary d not the expansion of the governor-pneumatic and thereby the lowering of the cut-off valve, and consequently a reduction of the exhaust force of the pumpbellows, so that the motor-bellows is permitted to expand under the tension of its spring, produce the actuation of the pneumatic valveaction, collapse of the governor-pneumatic, and lifting of the cut-ofl? valve, and so the quick and effective play of the parts and the regulation of the motor-bellows and pneumatic motor actuated thereby. W hen the action of the pump-bellows is diminished from any cause, the motor-bellows is expanded under the action of its spring, its valve is moved away from the stationary duct, so that the corresponding actuation of the cut-ofl' valve takes place, whereby the passage of air from the motor-bellows to the pump-bellows is facilitated and an increased suction on the pneumatic motor exerted.

The motor-bellows and the automatic valveaction by which the governor-pneumatic of the cutoff valve is operated are very effective for regulating the suction action of the air on the pneumatic motor, so that a uniform The pneumatic motor is thereby made independent of variationsin the pressure of the pump-bellows or of the speed or force oi'the pedal action, and is thereby enabled to drive the music-sheet at a uniform speed.

Having thus described my invention, I claim I, as new and desire to secure by Letters Patent- 1. In a governor for pneumatic motors, the combination, with themotor-bellows, of a valve for regulating the suction exerted on the same, a pneumatic for operating said valve,

combination, with the motor-bellows,-and the passage for suction air communicating with the'fixed part of the same, an interior valve in said motor-bellows slidable upon the fixed part of the, same and provided with an opening adapted to be shifted into or out of register with said passage, and means for actu-,

ating said valve.

4. In a governor for pneumatic motors, a motor-bellows, a suction air-passage leading thereto, a valve in said motor-bellows for controlling said passage, a pneumatic, and, an operative connection between said pneumatic.

and said valve.

5. A governor such as described, including a motor-bellows, a suction air-passage leading to the fixed wall of the same, an interior valve slidable on the rear wall or fixed part of said motor-bellows and operable to control said passage, a pneumatic governed by the inflation of said motor-bellows, and a rod connect ing the movable part of said pneumatic with said interior valve.

6. In agovernorsuch as described, the combination with the motor-bellows, and the pneumatic for controlling the suctionin the same,

of a valve-action in'communication with saidpneumatic, andmeans governed by the inflation of said motor-bellows for controlling such communication.

7. In a governor for pneumatic motors, a motor-bellows, a suction air-passage leading thereto, a valve for controlling said passage, a pneumatic for actuating said valve, a valveactlon in communication with said pneumatic, and a valve carried by the movable member of said motor-bellows for controlling such communication.

8. In a governor for pneumatic motors, the

combination, with the motor-bellows, and the pneumatic for controlling the suction therein, of a valve-action, a passage leading from the valve-chamber of said valve-action to said pneumatic, and means controlled by the inflation of said motor-bellows for actuating the valve of said-valve-action and thus producing a suction in said passage. v

9. In a governor for pneumatic motors, a motor-bellows, a pneumatic for controlling the suction therein, a valve-action, a passage leading from the valve-chamber of the latter to said pneumatic, a passage leading to the diaphragm-chamber of said valve-action, and a valve carried by the movable member of said motor-bellowsfor controlling said last-named passage. I

10. The combination, with a spring-expand ed motor-bellows, of agovernorpneumatic, a

sliding cut-off valve located in the wind-channel between said motor-bellows and the pumpbellows, a pneumatic valve-action, a stationary 'duct, connecting-ducts between the valve-action and the governor-pneumatic and the stationary duct, anda regulable valve on the movable member of the motor-bellows arranged to open or close said stationary duct for regulating the internal pressure of the motor-bellows.

11. The combination, with aspring-expanded motor-bellows and its connection with the motor-engine, ofamotor-regulator, consisting ofa cut-off valve located in the channel lead-' ing to the pump-bellowsfrom said motor-bellows, a governor-pneumatic connected with said cut-off valve, a pneumatic valve-action connected with said governor-pneumatic, a stationary duct also connected with said valveaction, and a valve supported on vthe movable part of the motor-bellows and adapted to open or close said duct so as to actuate the governor-pneumatic and produce the collapse or inflation of said motor-bellows 12. The combination, with aspring-expanded motor-bellows and pump-bellows, of a duct leading from the motor-bellows to the pneumatic motor, a governor-pneumatic, a cut-off valve actuated by said pneumatic and located in the wind-channel between the motor-bellows and pump-bellows, a pneumatic valveaction connected with the governor-pneumatic for actuating the same, a stationary duct connected with the diaphragm-chamber of the valve-action, a valve on the movable member of the motor-bellows adapted to open or close said duct by the vibrations of said member", so as to actuate the governor-pneumatic and regulate the suction action of the motor-bet lows.

13., The combination, with a spring-expanded motor-bellows and its connection with the pneumatic motor for the music-sheet, of a sliding cut-ofi valve controlling the wind-channel between the motor-bellows and pump-bellows,

a governor-pneumatic connected With said cutoff valve, a pneumatic valve-action, aflexible tube connecting the valve-chamber of said valve-action with said governor-pneumatic, a stationary duct, a pipe connection between said duct and the diaphragm-chamber of the valve-action, a valve on the movable member of the motor-bellows adapted to open or close the stationary duct by the vibrations of said I movable member, and means for adjusting 1 said valve relatively to said duct.

In testimony that I claim the foregoing" as my invention I have signed my name in presence of two subscribing witnesses.

JOSEPH W .IESER.

Witnesses:

PAUL GoEPEL, HENRY J. SUHRBIER. 

